United Mexican States vs Golfo de Campeche

United Mexican States and Golfo de Campeche both are nouns.

Word	Noun	Adjective	Verb	Adverb
United Mexican States	Yes	No	No	No
Golfo de Campeche	Yes	No	No	No

United Mexican States (noun)	Golfo de Campeche (noun)
a republic in southern North America; became independent from Spain in 1810	a part of the Gulf of Mexico to the west of Yucatan